Narrative:

Climb out of ZZZ1 with numerous leveloffs due to military airspace. ECAM-smoke in avionics at FL230. Captain pilot flying and took radios; first officer handled ECAM and dispatch. There were no secondary indications and no other problems with aircraft. While notifying flight attendants; they commented on unusually high amount of condensation in cabin. Thought that might have triggered smoke sensor. Gave flight attendant cabin advisory; declared emergency; landed ZZZ2. Fire personnel inspected aircraft and opened avionics with no indications; reported overweight landing. Maintenance inspected aircraft and we continued to ZZZ3.

Google
 

Original NASA ASRS Text

Title: An A320 flight crew experienced ECAM SMOKE IN AVIONICS in climb. They declared an emergency and diverted to a nearby airport.

Narrative: Climb out of ZZZ1 with numerous leveloffs due to military airspace. ECAM-smoke in avionics at FL230. Captain Pilot Flying and took radios; First Officer handled ECAM and Dispatch. There were no secondary indications and no other problems with aircraft. While notifying Flight Attendants; they commented on unusually high amount of condensation in cabin. Thought that might have triggered smoke sensor. Gave Flight Attendant cabin advisory; declared emergency; landed ZZZ2. Fire personnel inspected aircraft and opened avionics with no indications; reported overweight landing. Maintenance inspected aircraft and we continued to ZZZ3.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.